# 6N2P

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{{Short description|Miniature 9-pin dual triode vacuum tube}}
The '''6N2P''', (Russian: '''6Н2П'''), also sometimes spelled in English '''"6H2Pi"''', is a miniature 9-pin dual [triode](/source/triode) [vacuum tube](/source/vacuum_tube) manufactured in [USSR](/source/USSR), [Russia](/source/Russia) and [China](/source/China) with characteristics similar to the [12AX7](/source/12AX7). The most significant difference between the two is that 6N2P has its two filament elements connected in parallel, unlike the series filament connection of the [12AX7](/source/12AX7), and it is thus only possible to operate it from a 6.3 volt, 340 mA filament supply (whereas a [12AX7](/source/12AX7) may be operated from either 6.3 or 12.6 volts, at 300 mA or 150 mA, respectively.)
thumb|right|220px|Different 6N2P versions
The 6N2P is not a pin-compatible replacement for the [12AX7](/source/12AX7) - an adapter (Or rewiring the valve socket) is required. The amplification factor of 6N2P is 98 which is marginally lesser than [12AX7](/source/12AX7), its higher heater current draw is similar to a [5751](/source/5751). The [Chinese](/source/China) 6N4 (whose military issued variant is known by the designation 6N4-J) which is a pin-compatible replacement for the [12AX7](/source/12AX7) but has an amplification factor of 97.5 is the closest equivalent to the 6N2P.

In the 1970s an improved and more rugged version of the 6N2 was introduced, designated 6N2P-EV (Russian: 6Н2П-ЕВ). They also introduced a long life variant of the 6N2P-EV, designated 6N2P-ER (Russian: 6Н2П-ЕP). While the 6N2P-EV had a rated lifespan of ≥ 5,000 hours, the 6N2P-ER had a rated lifespan of ≥ 10,000 hours. 

In the late 1980s [http://voshod-krlz.com.ru Voskhod] Sunrise produced a [12AX7](/source/12AX7) variant derived from the 6N2P-EV, under the designation 12AX7VKA. The [http://voshod-krlz.com.ru Voskhod] Sunrise 12AX7VKA tube used a larger bottle than other 12AX7s and did not fit in most Chinese shield bases. However, it did fit in most NOS and Korean made shield bases. Currently, a re-issue of the [http://voshod-krlz.com.ru Voskhod] Sunrise 12AX7VKA albeit with a smaller normal [12AX7](/source/12AX7) sized glass bottle is being produced by [Sovtek](/source/Sovtek), under the designation 12AX7WA. 

A [Chinese](/source/China) version of 6N2P exists, labeled in Latin lettering (instead of [Cyrillic](/source/Cyrillic)) 6N2. A [Chinese](/source/China) version of the triple mica 6N2P-EV exists too, designated 6N2T. Currently a [12AX7](/source/12AX7) variant derived from the [Chinese](/source/China) 6N2T is manufactured by the [Shuguang tube factory](/source/Shuguang_tube_factory) exclusively for [https://www.tubeampdoctor.com/en/7025-wa-tad-highgrade-premium-selected?c=138 Tube Amp Doctor], under the designation ECC83 WA (7025 WA designation is used for the ones specially selected for high gain and low noise).

In the 1990s a (now extinct) line of "Red Bear" [guitar amplifiers](/source/guitar_amplifiers) was being produced in [Russia](/source/Russia) by Novik Ltd. and distributed in the [United States](/source/United_States) by [Gibson Guitar Corporation](/source/Gibson_Guitar_Corporation).  These amplifiers used 6N2P-EV tubes instead of the much more common [12AX7](/source/12AX7), prompting user modifications of the amplifier to [12AX7](/source/12AX7), because the original Russian 6N2P-EV was scarcely available outside of Russia.

<!--(Commenting this out until someone can clarify. This description lists two or perhaps three items [unclear], but photo shows four. Also it seems confused about left and right. If you can clear this up, please do, and use as an actual caption for the photo. Thanks!)  In the photo, from left to right - 6N2P produced in [USSR](/source/USSR) in 1967, 1974, 6N2 produced in [China](/source/China) and [Soviet Union](/source/Soviet_Union) 6N2P-EV (left), produced in 1980.-->

== References ==
{{reflist}}
* [http://www.drtube.com/datasheets/6n2p-ev.pdf 6n2p-ev rugged version of 6n2p Data sheet]
*[http://klausmobile.narod.ru/testerfiles/6n2p.htm 6n2p amplification factor]
*[https://images-na.ssl-images-amazon.com/images/I/41x11zsrGXL._AC_.jpg Beijing 6N4 datasheet]
* [http://frank.pocnet.net/sheets/127/5/5751.pdf 5751 data]
* [http://frank.pocnet.net/sheets/127/5/5751WA.pdf 5751WA data]
* [https://www.diyaudio.com/forums/instruments-and-amps/228983-adapter-6n2p-12ax7.html Using 6N2P in 12AX7 circuit]
Category:Vacuum tubes

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Adapted from the Wikipedia article [6N2P](https://en.wikipedia.org/wiki/6N2P) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/6N2P?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.